BS ISO IEC 29197-2015 pdf free download – Information technology — Evaluation methodology for environmental influence in biometric system performance.
5.3 Operational evaluations Operational evaluations consist of determining a specific environment and selecting one or more environmental parameters to assess. In these evaluations, the relevant biometric system performance and the selected environmental parameters to assess will be recorded at the same time. This approach provides insights into the degree to which biometric system performance is influenced by the assessed parameters of the operational environment. Operational evaluations are carried out in an uncontrolled environment. When performing this type of evaluation, it may be difficult to isolate the impact of environmental parameters on users, algorithms, or equipment; the impact is measured for the system as a whole.
Environmental conditions should reflect those typically encountered when the system is not underevaluation. Thus,an operational test may permit operationally viable practices such as use of a canopyfor outdoor collection of facial images. Therefore,for this evaluation, the operational environmentincluding physical layout as well as the environmental parameters that are going to be assessed shall bedescribed.
ln addition, it will be necessary that evaluators specify which evaluation conditions are of interest. ltwill require conducting a preliminary analysis of the operational environment for knowing the potentialvalues of the environmental parameters.
This analysis shall be carried out before planning the operational evaluation in order to determine thefollowing aspects:
– instruments for measuring and recording the environmental parameters to assess;- the localization of such instruments;
– the definition of the reference evaluation environment.
6Evaluation conditions specification
6.1 Introduction
Biometric systems can be tested in different evaluation conditions in order to analyse whether theirperformance is influenced by environmental conditions or not.This Clause defines requirements fordefining and measuring such evaluation conditions for all potential environmental paramieters that canbe tested during this kind of evaluations.
6.2Definition of evaluation conditions6.2.1 Description of the evaluation conditions
In general, the evaluation environmental conditions shall be defined considering the following twoaspects:
Environmental parameters to assess:These are the environmental conditions whose influenceis going to be studied. Such conditions will be established to a specific value or narrow rangedenominated measuring point. It is mandatory to specify at least one parameter.
Environmental parameters to control: These environmental conditions may influence biometricperformance but they are not the target of the trial.Such conditions will be established to the sameset point specified for the reference evaluation environment. It is optional to specify any controlparameter.
6.2.2Types of environmental parameters
One or more environmental parameters shall be established for the specification of the evaluation.Environmental parameters shall be described using units in the Sl system whenever possible.
An environmental evaluation may consider the following types of environmental parameters:a)Temperature: This parameter shall be specified using Celsius degrees [C].
b)Humidity: This parameter shall be specified by the percentage of relative humidity using [%6].llluminance: This parameter shall be specified using lux [lx ].
dlrradiance: This parameter shall be specified using watts per square meter [W/m2].e)Noise: This parameter shall be specified by the noise level using decibels [dB].
f) Atmospheric pressure: This parameter shall be specified using kilopascals [kPa].BS ISO IEC 29197 pdf download.